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Conformation of [Leu 5 ]Enkephalin from X-Ray Diffraction: Features Important for Recognition at Opiate Receptor

1978; American Association for the Advancement of Science; Volume: 199; Issue: 4334 Linguagem: Inglês

10.1126/science.204006

1095-9203

G. David Smith, Jane F. Griffin,

Neuroscience and Neuropharmacology Research

The conformation of [Leu 5 ]enkephalin is produced by a Tyr-Gly-Gly-Phe β bend stabilized by antiparallel hydrogen bonding between tyrosine and phenylalanine. On the basis of a comparison of the observed structure with the structure of known opiate agonists, three hydrophilic and two hydrophobic regions have been identified as contributing to the recognition of the molecule at the opiate receptor site.